Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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Cap. 8. cur
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exiguæ aquę
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guttæ ſupra
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aquæ
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aſcendunt.</
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PROP. CLXXXVIII.
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In fiſtulis strictioribus altiùs aqua eleuari debet, quàm in
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latioribus, & in fistulis æqualibus, ſed in æqualiter ad
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aquæ ſuperficiem inclinatis aqua ad eamdem
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altitudinem eleuatur.
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">ET primo loco percipitur quare in fiſtulis latio
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ribus aqua ad minorem altitudinem eleuatur,
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quàm in ſubtiliſſimis, & anguſtiſſimis canalibus: &
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eſt, quia adhærentia, & connexio aquæ parietibus
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internis canalium maiorem proportionem ad molem
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aquæ inſinuatæ extenſiuè, & intenſiuè in canaliculis
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ſubtiliſſimis, habet quàm in amplis, & capacioribus.
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">Et quoad extenſionem pertinet, quia vis adhæſionis
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menſuratur à contactibus, & ideò à ſuperficie inter
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na canaliculorum, è contrà reſiſtentia menſuratur à
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pondere cylindri aquei contenti in ijſdem canalicu
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lis, eſtque proportio cylindrorum aqueorum
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eiuſdẽ
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altitudiais duplicata eius rationis, quam habent eo
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rum perimetri | interni, igitur quanto magis creſcit
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interna canalis amplitudo, tantò magis minuitur ad
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hæſio, & augetur reſiſtentia ponderis ipſius aquæ
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cõ-tentæ
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tentæ</
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. </
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adhæſionis, proptereà quod, vt dictum eſt ſupra,
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eſt æquè valida facultas, & energia adhæſionis aquę,
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& connexionis | cum parietibus internis |in | vniuerſo
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illo argine montuoſo, ſed eſt minus efficax, quantò
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magis ab internis parietibus remouetur. </
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